<template>
	<view class="stat__select">
		<!-- hide-on-phone -->
		<span v-if="label" class="uni-label-text">{{ label + '：' }}</span>
		<view class="uni-stat-box" :class="{ 'uni-stat__actived': current }">
			<view
				class="uni-select"
				:style="{ height: multiple ? '100%' : ' 35px;' }"
				:class="{ 'uni-select--disabled': disabled }"
			>
				<view class="uni-select__input-box" :style="{ height: multiple ? '100%' : '35px;' }" @click="toggleSelector">
					<view
						class="form-item"
						v-if="multiple && current.length > 0"
					>
						<view class="tag-box">
							<view
								class="tag-calss"
								v-for="(item) in collapseTags ? current.slice(0, collapseTagsNum) : current"
								:key="item[dataValue]"
							>
								<span class="text">{{ item[dataKey] }}</span>
								<view @click.stop="delItem(item)">
									<uni-icons type="close" style="margin-left: 6rpx;" size="16" color="#FF0000"></uni-icons>
								</view>
							</view>
							<view v-if="current.length > collapseTagsNum && collapseTags" class="tag-calss">
								<span class="text">+{{ current.length - collapseTagsNum }}</span>
							</view>
						</view>
						<input
							v-if="filterable && !disabled"
							@input="inputChange"
							class="uni-select__input-text"
							type="text"
							style="font-size: 12px;height: 52rpx;margin-left: 6px;width: auto;"
							placeholder="请输入"
							v-model="filterInput"
						/>
					</view>
					<view v-else-if="current && current.length > 0 && !showSelector" class="uni-select__input-text">
						{{ current }}
					</view>
					<input
						v-else-if="filterable && showSelector"
						:focus="isFocus"
						@input="inputChange"
						:disabled="disabled"
						@click.stop=""
						class="uni-select__input-text"
						type="text"
						style="font-size: 12px;position: absolute;z-index: 1;"
						:placeholder="placeholderOld"
						v-model="filterInput"
					/>
					<view v-else class="uni-select__input-text uni-select__input-placeholder">{{ typePlaceholder }}</view>
					<uni-icons
						v-if="(current.length > 0 && clear && !disabled) || (currentArr.length > 0 && clear && !disabled)"
						type="clear"
						color="#c0c4cc"
						style="position: absolute;right: 0;"
						@click="clearVal"
					/>
					<uni-icons
						style="right: 0;position: absolute;"
						v-else
						:type="showSelector ? 'top' : 'bottom'" size="14"
						color="#999"
					/>
				</view>
				<view class="uni-select--mask" v-if="showSelector" @click="toggleSelector" />
				<view class="uni-select__selector" v-if="showSelector">
					<view class="uni-popper__arrow"></view>
					<scroll-view scroll-y="true" class="uni-select__selector-scroll">
						<view class="uni-select__selector-empty" v-if="filterMixinDatacomResData.length === 0">
							<span>{{ emptyTips }}</span>
						</view>
						<view
							v-else class="select__selector-item"
							style="display: flex;justify-content: space-between;align-items: center;"
							v-for="(item, index) in filterMixinDatacomResData"
							:key="index"
							@click="change(item)"
						>
							<span :class="{ 'uni-select__selector__disabled': item.disable }">{{ formatItemName(item) }}</span>
							<uni-icons v-if="multiple && currentArr.includes(item[dataValue])" type="checkmarkempty" color="#ff6885" />
						</view>
					</scroll-view>
				</view>
			</view>
		</view>
	</view>
</template>

<script>
/**
 * DataChecklist 数据选择器
 * @description 通过数据渲染的下拉框组件
 * @tutorial https://uniapp.dcloud.io/component/uniui/uni-data-select
 * @property {String} value 默认值
 * @property {Array} localData 本地数据 ，格式 [{text:'',value:''}]
 * @property {Boolean} clear 是否可以清空已选项
 * @property {Boolean} emptyText 没有数据时显示的文字 ，本地数据无效
 * @property {String} label 左侧标题
 * @property {String} placeholder 输入框的提示文字
 * @property {Boolean} disabled 是否禁用
 * @event {Function} change  选中发生变化触发
 */

export default {
	name: "uni-stat-select",
	mixins: [uniCloud.mixinDatacom || {}],
	props: {
		collapseTagsNum: {
			type: Number,
			default: 1
		},
		collapseTags: {
			type: Boolean,
			default: false
		},
		dataKey: {
			type: [String],
			default: 'text'
		},
		dataValue: {
			type: [String],
			default: 'value'
		},
		multiple: {
			type: Boolean,
			default: false
		},
		filterable: {
			type: Boolean,
			default: false
		},
		localData: {
			type: Array,
			default() {
				return []
			}
		},
		value: {
			type: [String, Number, Array],
			default: ''
		},
		label: {
			type: String,
			default: ''
		},
		placeholder: {
			type: String,
			default: '请选择'
		},
		emptyTips: {
			type: String,
			default: '无选项'
		},
		clear: {
			type: Boolean,
			default: true
		},
		defItem: {
			type: Number,
			default: 0
		},
		disabled: {
			type: Boolean,
			default: false
		},
		// 格式化输出 用法 field="_id as value, version as text, uni_platform as label" format="{label} - {text}"
		format: {
			type: String,
			default: ''
		},
	},
	data() {
		return {
			showSelector: false,
			current: [],
			mixinDatacomResData: [],
			apps: [],
			channels: [],
			cacheKey: "uni-data-select-lastSelectedValue",
			placeholderOld: "",
			currentArr: [],
			filterInput: "",
			isFocus: false,
			allOptions: []
		}
	},
	created() {
		if (this.multiple) {
			this.currentArr = this.value || []
			if (this.current.length > 0) {
				this.current = []
			}
			if (this.value && this.value.length > 0 && this.filterMixinDatacomResData.length > 0) {
				this.current = this.value.map(item => {
					let current = this.mixinDatacomResData.find(e =>
						e[this.dataValue] == item
					)
					return {
						...current
					}
				})
			}
		} else {
			if (this.value || this.value == 0) {
				this.current = this.formatItemName(this.filterMixinDatacomResData.find(e =>
					e[this.dataValue] == this.value
				))
			}
		}
		this.placeholderOld = this.placeholder
		this.debounceGet = this.debounce(() => {
			this.query();
		}, 300);
		if (this.collection && !this.localData.length) {
			this.debounceGet();
		}
	},
	computed: {
		filterMixinDatacomResData() {
			// if (this.filterable && this.filterInput) {
			// 	return this.mixinDatacomResData.filter(e => e[this.dataKey].includes(this.filterInput))
			// } else {
			return this.mixinDatacomResData
			// }
		},
		typePlaceholder() {
			const text = {
				'opendb-stat-app-versions': '版本',
				'opendb-app-channels': '渠道',
				'opendb-app-list': '应用'
			}
			const common = this.placeholder
			const placeholder = text[this.collection]
			return placeholder ?
				common + placeholder :
				common
		},
		valueCom() {
			return this.value
		}
	},
	watch: {
		localData: {
			immediate: true,
			deep: true,
			handler(val, old) {
				this.allOptions = val
				if (Array.isArray(val) && old !== val) {
					this.mixinDatacomResData = val
				}
			}
		},
		valueCom(val, old) {
			this.initDefVal()
		},
		mixinDatacomResData: {
			immediate: true,
			deep: true,
			handler(val) {
				if (val.length) {
					this.initDefVal()
				}
			}
		}
	},
	methods: {
		debounce(fn, time = 100) {
			let timer = null
			return function (...args) {
				if (timer) clearTimeout(timer)
				timer = setTimeout(() => {
					fn.apply(this, args)
				}, time)
			}
		},
		// 执行数据库查询
		query() {
			this.mixinDatacomEasyGet();
		},
		// 监听查询条件变更事件
		onMixinDatacomPropsChange() {
			if (this.collection) {
				this.debounceGet();
			}
		},
		initDefVal() {
			let defValue = ''
			if ((this.valueCom || this.valueCom === 0) && !this.isDisabled(this.valueCom)) {
				defValue = this.valueCom
			} else {
				let strogeValue
				if (this.collection) {
					strogeValue = this.getCache()
				}
				if (strogeValue || strogeValue === 0) {
					defValue = strogeValue
				} else {
					let defItem = ''
					if (this.defItem > 0 && this.defItem <= this.mixinDatacomResData.length) {
						defItem = this.mixinDatacomResData[this.defItem - 1][this.dataValue]
					}
					defValue = defItem
				}
				if (defValue || defValue === 0) {
					this.emit(defValue)
				}
			}
			if(!defValue) return
			if (this.multiple) {
				const allOptions = this.allOptions
				this.current = defValue.map(item => {
					const current = allOptions.find(e => {
						return e[this.dataValue] == item
					})
					return {
						...current
					}
				})
				this.currentArr = this.current.map(e => e[this.dataValue])
				if (this.valueCom.length < 1) {
					this.currentArr = []
				}
			} else {
				const def = this.allOptions.find(item => item[this.dataValue] === defValue)
				this.current = def ? this.formatItemName(def) : ''
			}
		},
		/**
		 * @param {[String, Number]} value
		 * 判断用户给的 value 是否同时为禁用状态
		 */
		isDisabled(value) {
			let isDisabled = false;

			this.mixinDatacomResData.forEach(item => {
				if (item[this.dataValue] === value) {
					isDisabled = item.disable
				}
			})
			return isDisabled;
		},
		inputChange(e) {
			this.$emit('inputChange', e.detail.value)
		},
		clearVal() {
			if (this.disabled) {
				return
			}
			if (this.multiple) {
				this.current = []
				this.currentArr = []
				this.emit([])
			} else {
				this.current = ""
				this.currentArr = []
				this.emit('')
			}
			if (this.collection) {
				this.removeCache()
			}
			this.placeholderOld = this.placeholder
			this.filterInput = ""
		},
		change(item) {
			if (!item.disable) {
				this.showSelector = false
				if (this.multiple) {
					if (!this.current) {
						this.current = []
					}
					if (!this.currentArr) {
						this.currentArr = []
					}
					if (this.currentArr.includes(item[this.dataValue])) {
						let index = this.current.findIndex(e => {
							return e[this.dataValue] == item[this.dataValue]
						})
						this.current.splice(index, 1)
						this.currentArr.splice(index, 1)
						this.emit(this.current)
					} else {
						this.current.push(item)
						this.currentArr.push(item[this.dataValue])
						this.emit(this.current)

					}
					this.filterInput = ""
				} else {
					this.current = this.formatItemName(item)
					if (this.filterable) {
						this.filterInput = item[this.dataKey]
					}
					this.emit(item[this.dataValue])
				}
			}
		},
		delItem(item) {
			if (this.disabled) {
				return
			}
			if (this.currentArr.includes(item[this.dataValue])) {
				let index = this.current.findIndex(e => {
					return e[this.dataValue] == item[this.dataValue]
				})
				this.current.splice(index, 1)
				this.currentArr.splice(index, 1)
				this.emit(this.current)
			}
		},
		emit(val) {
			if (this.multiple) {
				this.$emit('input', this.currentArr)
			} else {
				this.$emit('input', val)
			}
			if (this.collection) {
				this.setCache(val);
			}
			this.$emit('change', val)
		},
		toggleSelector() {
			if (this.disabled) {
				return
			}
			// if (this.filterable && this.filterInput && this.mixinDatacomResData.findIndex(e => {
			// 		return e[this.dataKey] == this
			// 			.filterInput
			// 	}) < 0) {
			// 	if (!this.multiple) {
			// 		this.filterInput = ""
			// 	}

			// }
			this.showSelector = !this.showSelector
			this.isFocus = this.showSelector
			if (this.filterable && this.current && this.showSelector) {
				if (!this.multiple) {
					this.placeholderOld = this.current
					// this.filterInput = ""
				}
			} else if (this.filterable && !this.current && !this.showSelector) {
				if (this.placeholderOld != this.placeholder) {
					if (!this.multiple) {
						this.current = this.placeholderOld
					}
				}
			}
			this.filterInput = ""

		},
		formatItemName(item) {
			if (!item) {
				return ""
			}
			let text = item[this.dataKey]
			let value = item[this.dataValue]
			let {
				channel_code
			} = item
			channel_code = channel_code ? `(${channel_code})` : ''
			if (this.format) {
				// 格式化输出
				let str = "";
				str = this.format;
				for (let key in item) {
					str = str.replace(new RegExp(`{${key}}`, "g"), item[key]);
				}
				return str;
			} else {
				return this.collection.indexOf('app-list') > 0 ?
					`${text}(${value})` :
					(
						text ?
							text :
							`未命名${channel_code}`
					)
			}
		},
		// 获取当前加载的数据
		getLoadData() {
			return this.mixinDatacomResData;
		},
		// 获取当前缓存key
		getCurrentCacheKey() {
			return this.collection;
		},
		// 获取缓存
		getCache(name = this.getCurrentCacheKey()) {
			let cacheData = uni.getStorageSync(this.cacheKey) || {};
			return cacheData[name];
		},
		// 设置缓存
		setCache(value, name = this.getCurrentCacheKey()) {
			let cacheData = uni.getStorageSync(this.cacheKey) || {};
			cacheData[name] = value;
			uni.setStorageSync(this.cacheKey, cacheData);
		},
		// 删除缓存
		removeCache(name = this.getCurrentCacheKey()) {
			let cacheData = uni.getStorageSync(this.cacheKey) || {};
			delete cacheData[name];
			uni.setStorageSync(this.cacheKey, cacheData);
		},
	}
}
</script>

<style lang="scss">
$uni-base-color: #6a6a6a !default;
$uni-main-color: #333 !default;
$uni-secondary-color: #909399 !default;
$uni-border-3: #e5e5e5;


/* #ifndef APP-NVUE */
@media screen and (max-width: 500px) {
	.hide-on-phone {
		display: none;
	}
}

/* #endif */
.stat__select {
	display: flex;
	align-items: center;
	// padding: 15px;
	width: 100%;
	flex: 1;
	box-sizing: border-box;
}

.uni-stat-box {
	width: 100%;
	flex: 1;
}

.uni-stat__actived {
	width: 100%;
	flex: 1;
	// outline: 1px solid #2979ff;
}

.uni-label-text {
	font-size: 14px;
	font-weight: bold;
	color: $uni-base-color;
	margin: auto 0;
	margin-right: 5px;
}

.uni-select {
	font-size: 14px;
	border: 1px solid $uni-border-3;
	box-sizing: border-box;
	border-radius: 4px;
	padding: 0 5px;
	padding-left: 10px;
	position: relative;
	/* #ifndef APP-NVUE */
	display: flex;
	user-select: none;
	/* #endif */
	flex-direction: row;
	align-items: center;
	border-bottom: solid 1px $uni-border-3;
	width: 100%;
	flex: 1;
	height: 35px;
	min-height: 35px;
}

.uni-select__label {
	font-size: 16px;
	// line-height: 22px;
	min-height: 35px;
	height: 35px;
	padding-right: 10px;
	color: $uni-secondary-color;
}

.uni-select__input-box {
	height: 35px;
	position: relative;
	/* #ifndef APP-NVUE */
	display: flex;
	/* #endif */
	flex: 1;
	flex-direction: row;
	align-items: center;
	.form-item {
		display: flex;
		justify-content: space-between;
		align-items: center;
		width: 100%;
		padding: 10rpx 34rpx 10rpx 0;
		.tag-box {
			flex: 1;
			display: flex;
			flex-wrap: wrap;
			align-items: center;
		}
		.uni-select__input-text {
			width: 25% !important;
		}
	}
	.tag-calss {
		display: flex;
		align-items: center;
		max-width: 100%;
		height: 24px;
		padding: 0 4px 0px 8px;
		margin: 2px 0 2px 6px;
		font-family: Helvetica Neue, Helvetica, PingFang SC, Hiragino Sans GB, Microsoft YaHei, SimSun, sans-serif;
		font-weight: 400;
		-webkit-font-smoothing: antialiased;
		-webkit-tap-highlight-color: transparent;
		font-size: 12px;
		border: 1px solid #ff6885;
		border-radius: 24px;
		white-space: nowrap;
		line-height: 22px;
		box-sizing: border-box;
		background-color: #ffffff;
		color: #ff6885;

		.text {
			font-family: Helvetica Neue, Helvetica, PingFang SC, Hiragino Sans GB, Microsoft YaHei, SimSun, sans-serif;
			font-weight: 400;
			-webkit-font-smoothing: antialiased;
			-webkit-tap-highlight-color: transparent;
			font-size: 12px;
			white-space: nowrap;
			line-height: 22px;
			color: #ff6885;
			overflow: hidden;
			text-overflow: ellipsis;
		}

		.clear-icon {
			width: 28rpx;
			height: 28rpx;
			display: flex;
			justify-content: center;
			align-items: center;
			margin: 0 8rpx;
			border: 2rpx solid #ff0000;
			border-radius: 28rpx;
			font-size: 28rpx;
			color: #ff0000;
		}
	}
}

.uni-select__input {
	flex: 1;
	font-size: 14px;
	height: 22px;
	line-height: 22px;
}

.uni-select__input-plac {
	font-size: 14px;
	color: $uni-secondary-color;
}

.uni-select__selector {
	/* #ifndef APP-NVUE */
	box-sizing: border-box;
	/* #endif */
	position: absolute;
	top: calc(100% + 12px);
	left: 0;
	width: 100%;
	background-color: #FFFFFF;
	border: 1px solid #EBEEF5;
	border-radius: 6px;
	box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
	z-index: 3;
	padding: 4px 0;
}

.uni-select__selector-scroll {
	/* #ifndef APP-NVUE */
	max-height: 200px;
	box-sizing: border-box;
	/* #endif */
}

.uni-select__selector-empty,
.select__selector-item {
	/* #ifndef APP-NVUE */
	display: flex;
	cursor: pointer;
	/* #endif */
	line-height: 35px;
	font-size: 14px;
	text-align: center;
	/* border-bottom: solid 1px $uni-border-3; */
	padding: 0px 10px;
}

.select__selector-item:hover {
	background-color: #f9f9f9;
}

.select__selector-item:active {
	background-color: #FFFF;
}

.uni-select__selector-empty:last-child,
.select__selector-item:last-child {
	/* #ifndef APP-NVUE */
	border-bottom: none;
	/* #endif */
}

.uni-select__selector__disabled {
	opacity: 0.4;
	cursor: default;
}

/* picker 弹出层通用的指示小三角 */
.uni-popper__arrow,
.uni-popper__arrow::after {
	position: absolute;
	display: block;
	width: 0;
	height: 0;
	border-color: transparent;
	border-style: solid;
	border-width: 6px;
}

.uni-popper__arrow {
	top: -6px;
	left: 10%;
	margin-right: 3px;
	border-top-width: 0;
	border-bottom-color: #EBEEF5;
}

.uni-popper__arrow::after {
	content: " ";
	top: 1px;
	margin-left: -6px;
	border-top-width: 0;
	border-bottom-color: #fff;
}

.uni-select__input-text {
	// width: 280px;
	width: 90%;
	color: $uni-main-color;
	white-space: nowrap;
	text-overflow: ellipsis;
	-o-text-overflow: ellipsis;
	overflow: hidden;
}

.uni-select__input-placeholder {
	color: $uni-base-color;
	font-size: 12px;
}

.uni-select--mask {
	position: fixed;
	top: 0;
	bottom: 0;
	right: 0;
	left: 0;
}
</style>